Magnitude 5.4 Earthquake of Las Heras, Argentina 2013 July 22

2013-07-22 00:03:14 UTC : Las Heras, Argentina EARTHQUAKE

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Magnitude: 5.4

Event Time: Time and Date Starting of Earthquake Rupture 

2013-07-22 00:03:14 UTC

2013-07-21 21:03:14 UTC-03:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

47.021°S 69.752°W

Depth : Depth of starting Rupture 

21.1km (13.1mi)

Region : Las Heras, Argentina

Directions and Distances :Directions and Distances from Geographical Reference in Close Proximity Which can be effected by Location Uncertainty

a) 81km (50mi) SW of Las Heras, Argentina

b) 139km (86mi) W of Pico Truncado, Argentina

c) 181km (112mi) WSW of Caleta Olivia, Argentina

d) 215km (134mi) SW of Comodoro Rivadavia, Argentina

e) 1007km (626mi) WNW of Stanley, Falkland Islands

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	5.4 mb	± 0.09
Location	47.021°S, 69.752°W	± 144.0 km
Depth	21.1 km	± 28.0 km
Number of Phase Applied1	44
Minimum Distance2	8510.3 km (76.45°)
Travel Time Residual3	1.40 sec
Azimuthal Gap4	258°

¹Number of phase Applied: 

In determining location of hypocenter, applied number of observations on P waves and S waves. The greater the more accurate prediction of EQ.

²Minimum Distance:

 Horizontal distance of nearest Station measured in Km from epicenter. The smaller the more accuracy in prediction of depth of EQ.

³Travel Time Residual:

 A way of measurement of fit of arrival time observed to arrival time predicted for particular location. The smaller the better fit of data.

⁴Azimuthal Gap: 

Expressed in degree; the smaller the smaller the error in horizontal positioning of EQ. Large uncertainty is considered when exceeds 180° (both depth and location)